TE-20? I have the same guitar. Actually two of them, lol. I dropped in a set of these cheap pickups into one of them and I love it. They're much hotter and more responsive. It made then guitar feel more alive in my hands.
https://www.amazon.com/dp/B07MK1WJ9H/ref=cm_sw_r_cp_apa_fabc_05ZaGb2JJ1HJ4?_encoding=UTF8&psc=1
Holmer Guitar Nut Slotting File Saw Rods Slot Filing Set Needle File Set Luthier Replacement Tools Tip Cleaner Files. https://www.amazon.com/dp/B08FQN1X2H/ref=cm_sw_r_cp_api_i_YZ0174GTCH3S7DRZ7R90
I have a set of these little guys - go carefully - can always do more.
After taking the controlboard apart, i've figured out it is the switch that faulty. Do you think this would work as a replacement? https://www.amazon.co.uk/Musiclily-Metric-Selector-Pickup-Electric/dp/B00ZQXTSP4/ref=sr\_1\_7?crid=16JGD8HKEJDTC&keywords=telecaster+switch&qid=1649259556&sprefix=telecaster+switch%2Caps%2C71&sr=8-7
I replaced mine with a set of locking Grovers off of Amazon. They look great and work fantastically. Very smooth. They were just over $50 and definitely worth the upgrade.
Grover 406C Rotomatic Mini 3 per Side Self Locking Machine Heads, Chrome https://www.amazon.com/dp/B0007Y3XGW/ref=cm_sw_r_apan_glt_i_43BZFT15ZAB9BY124C5G?_encoding=UTF8&psc=1
Vintage Forge Black Top Hat Bell Knobs Compatible with Epiphone Les Paul Import Electric Guitar (Set of 4) Fits 18 Coarse-Spline Alpha (Metric) Split Shaft Pots Recessed RB18M-BLK4 https://www.amazon.com/dp/B08MZ5QMVK/ref=cm_sw_r_cp_api_glt_fabc_KH9JG6RZYVY4P2TTRRKW?_encoding=UTF8&psc=1
These fit perfect and are 18 spline metric. Good trem clearance too!
Vintage Forge Black Top Hat Bell Knobs Compatible with Epiphone Les Paul Import Electric Guitar (Set of 4) Fits 18 Coarse-Spline Alpha (Metric) Split Shaft Pots Recessed RB18M-BLK4 https://www.amazon.com/dp/B08MZ5QMVK/ref=cm_sw_r_cp_api_glt_fabc_TCB0P89R4ZE2R1KG6H0A?_encoding=UTF8&psc=1
The bit that fits round the bridge needed cutting and filling as the HB one goes a bit deeper.
Edit - and few new screw holes needed drilling.
I put grover 406c locking tuners on my cst24. Love them so far. This is my first set of locking tuners and Im kicking myself for not doing this 2 decades ago.
I ended up trying the Guyker tuners, and returned them immediately. They were the correct length (even a little taller than the OEM tuners), but they were such poor quality. The gears were very rough while turning/tuning, the locking mechanism threads were rough and didn't lock the high E, or B string well at all. I did a moderate pitch bend and the string dropped 2 octaves, and that's with me tightening the locking posts down as hard as I could with my fingers. I may try something else, but if anything I'll just buy some nicer regular tuners instead.
Thanks! I used inlay stickers. They are around 10 bucks and work great. Haven't peeled or anything like that and hard to tell that they aren't inlays unless you run your finger over them or look real close.
https://www.amazon.com/dp/B00NSESRA0?ref=ppx_pop_mob_ap_share
Got then here on Amazon. They have a few different styles. Almost went with dives but it's a double dove on 12th and I didn't like that look.